US3527373A - Moulded container having integral reinforcing - Google Patents

Moulded container having integral reinforcing Download PDF

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Publication number
US3527373A
US3527373A US773901A US3527373DA US3527373A US 3527373 A US3527373 A US 3527373A US 773901 A US773901 A US 773901A US 3527373D A US3527373D A US 3527373DA US 3527373 A US3527373 A US 3527373A
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United States
Prior art keywords
container
cover
flange
containers
walls
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Expired - Lifetime
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US773901A
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English (en)
Inventor
Pierre Jean Gabriel Giraudet
Jean Eugene Raphael Giraudet
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/02—Removable lids or covers
    • B65D43/12—Removable lids or covers guided for removal by sliding

Definitions

  • the present invention relates to moulded containers which can be stacked onto each other and may be used particularly for the shipping and stocking of perishable goods.
  • the invention relates also to a process for improving the mechanical strength of such moulded containers.
  • Some containers have been known to be made by moulding foamed or expanded plastic material such as expanded polystyrene, having good isothermal properties, low weight, good tightness and good resistance to insect and parasite attack.
  • Known containers of this type have an open top face and can be optionally closed with a cover placed on the container body.
  • the lower edges of these containers are perpendicular, whereas their internal surface has an arcuate profile over the entire bottom periphery to allow for easier stripping from the mould and easier cleaning of the container bottom.
  • the remainder of the side Walls of such containers have a constant thickness up to the upper edge which is cut at right angles to provide a good support for another container directly stacked onto the first one.
  • an inwardly projecting flange is provided on at least a portion of the upper periphery of the container, by means of a mould having conveniently constructed movable parts. Due to this arrangement, there is also provided a fillet or profiled reinforcement between the lower face of said flange and the internal face of the corresponding side wall of the container. Another symmetrical profiled reinforcement is provided on the internal face of the container along its lower periphery.
  • the container side walls are formed, at their bottom and at their top, with L-shaped channels. Besides, because the internal angle of these L-shaped channels is provided with a reinforcement, the thickness of the corresponding walls is relatively larger along the upper and lower edges, thus constituting reinforcing beams.
  • the wall together with the upper flange and the adjacent part of the bottom forms a U-shaped profile which presents all the obvious advantages of such a profile as far as the buckling strength and tearing strength are concerned, as compared to the corresponding L-shaped parts of known containers.
  • the reinforcing beams provided along the lower and upper edges of the wall enhance this desirable effect by firmly maintaining the sheet constituting the wall.
  • the overall thickness of the container walls can be substantially decreased according to the process of the invention, which constitutes a compensation for the supplementary raw material necessary for making the upper flanged and arched portions and yet allows for obtaining stronger walls having an improved buckling strength not only in a lateral direction with respect to the beams, that is to say horizontally but also in a vertical direction, which is normally the most important feature.
  • the central portion of the walls constitutes a veil-like web fixed up between the upper and lower beams.
  • a flat cover can be provided to close the container of the invention.
  • This cover is preferably sliding and provided on two of its opposite edges with projecting ribs capable of cooperating with complementary longitudinal grooves provided in the corresponding inwardly projecting upper flanges.
  • a raisable cover having flared edges supported on the flared upper flanges of the container, by a dovetailed stud fixing device.
  • FIG. 1 shows a cross-sectional view of the conventional container
  • FIG. 2 is a cross-sectional view of a container according to the invention.
  • FIG. 3 shows a perspective view of an embodiment of the container of the invention having a sliding cover
  • FIG. 4 is a cross-sectional view of the container of FIG. 3, showing the upper flange and the reinforcements;
  • FIG. 5 is a cross-sectional view of a wall of a container according to another embodiment of the invention.
  • FIG. 6 is a cross-sectional view showing the jointed portion of a mould closed on the internal face of the side wall of a container according to the invention.
  • FIG. 7 is a cross-sectional view showing the same parts as those of FIG. 6, the jointed portion of the mold being separated from the corresponding part of the container;
  • FIG. 8 is a perspective view of still another embodiment of a container according to the invention, having an upper flange on its four sides and closed by a cover;
  • FIG. 9 is a perspective view of a further embodiment of a container provided with the upper groove on both its longer sides, and dovetailed notches for receiving the cover;
  • FIG. 10 is a perspective view of the cover of the container shown on FIG. 9;
  • FIG. 11 is a perspective view of another embodiment of the container having said upper flange on three sides thereof and adapted to receive a sliding cover;
  • FIG. 12 is a cross-sectional view of the beams formed at the converging angles of four containers of the invention, placed side by side and stacked by groups of two.
  • the container preferably moulded of expanded polystyrene, has its outside shaped as a rectangular parallelepiped and comprises four side walls 1 and a bottom 2.
  • the internal periphery of the bottom is rounded so as to form a reinforcement 5 between the bottom and the side walls.
  • the top face of said container is provided with a removable cover 6.
  • both the longer side walls are provided respectively, along their upper edge, with a flange 7 projecting toward the inside of the container.
  • the lower part of said flange 7 is extended toward the internal face of the corresponding side wall by a reinforcement 8 symmetrical to the reinforcement 5 at the bottom of this side wall.
  • the side walls 8 and 5 are archor ogive-shaped.
  • Each flange 7 is formed on its edge with a longitudinal groove 9 extending over the whole length of the said flange.
  • Cover 6 is provided on its side edges with a rib 10 having a profile complementary to the one of groove 9 which acts as a slide for the cover.
  • Such an assembly overcomes the disadvantages of the conventional containers of the considered type, such as the container shown in FIG. 1; these disadvantages comprise: relatively higher fragility of the side walls, loss of useful volume at the bottom of the flange of the cover particularly when such containers are arranged in rows, and relatively larger amounts of raw material used to make the cover.
  • the flanges 7 and the grooves 9 are made simultane ously with the remaining portions of the container, using of a mould having several jointed parts 11 and 12, according to a known technique (cf. FIGS. 6 and 7).
  • the minimum free space between the jointed parts of the mould is determined by the width divided by the flange 7 (see FIG. 7).
  • the thickness of the walls of the container at the level of the upper reinforcements 8 is preferably equal to their thickness at the level of the lower reinforcements 5 so as not to have an increased setting and cooling time prior to withdrawing from the mould.
  • the covers contrary to the known fitting covers used with known type containers, can be moulded in an upright position so as to obtain more covers during one moulding operation. Furthermore, because the cover is flat and has a smaller area than the upper face of the container, the amount of raw material saved with the instant cover is important.
  • Openings 13 for the venting of contents of the container, or for the draining of waste liquids can be provided.
  • conveniently arranged stubs 14 are mounted on the corresponding jointed parts 11 of the mould.
  • the stripping of the mould from these openings 13 will be effected in the same way and preferably at the same time and by the same element as the stripping of flanges 7 and grooves 9.
  • the container has a flange 7 on three of its sides.
  • the cover is introduced into grooves 9 from the side which has no flange, it slides in the groove of the two lateral flanges then contacts the opposite flange at the end of its travel.
  • the flange 7 extends over the whole upper periphery of the container.
  • the edge 15 of said flange 7 is outwardly flared, the edges 16 of the four sides of the cover having a complementary flared profile.
  • the flared edge 15 of the flange comprises dovetailing notches 17.
  • Dovetailed stubs 18, shaped complementarily to notches 17, are provided on the periphery of the cover wherefrom they project in the area corresponding to the flaring.
  • Marginal recessed notches 19 and/or median recessed notches 20 are provided in the upper part of the cover to allow gripping thereof so as to separate it from the container.
  • the cover is thus put in place and taken out vertically.
  • the stability of the container is still further increased and the buckling strength of the side walls is maximum
  • the containers according to the invention can be stacked and stored side by side to form compact blocks in warehouses, store-rooms in ships, railway or road trucks.
  • the buckling strength and tearing strength constitute an important economy factor, for it determines the limit, in terms of stacked containers or in terms of height of the stack, beyond which it is no longer possible to pile up containers without a risk of tearing or rupture.
  • the stacking and placing side by side of identical containers according to the invention form at each of the points of juxtaposition of the container corners stack edges, composite beams 21 having large sections, said beams being constituted by the combination of the corners having reinforcements 5, of both up per containers 22, and of the corners having flanges 7 and reinforcements 8, of both lower containers 23 (see FIG. 12).
  • the stability of each container of the block and the stiffness of the side walls thereof are substantially increased in comparison to conventional containers arranged in similar blocks, the adjacent walls 24 of both lower containers 23 being then comparable to median legs of two U-shaped back-to-back channels.
  • reinforcements 5 and 8 can have a flat or semi-circular profile, or one or both reinforcements can be omitted without any loss of the advantages of the invention.
  • the fixing means of the cover can also be modified according to the desired use of the container.
  • a stackable container made of a molded plastic material such as expanded polystyrene, comprising a bottom wall and four side walls extending upwardly from the peripheral edges of said bottom wall, the latter being provided with a bottom edge reinforcement extending along at least a portion of said peripheral edges of the bottom, and including thickened angle portions defined by concave inner surfaces, said thickened angle portions joining the inner faces of at least some of the side walls with the upper surface of said bottom wall, said side walls having a peripheral flange arranged at at least a portion of their upper edges and extending inwardly therefrom and having a concave configuration, a fillet-like flange reinforcement extending in the corner formed between each side wall and the corresponding portion .of said flange.
  • a molded plastic material such as expanded polystyrene
  • peripheral flange comprises two opposite flange portions extending respectively along the upper edges of two opposite side walls and having each an inwardly directed surface which is provided with a longitudinal flange groove, the two flange grooves being adapted to receive slideahly opposite longitudinal end portions of a cover for closing the top end of said container.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Stackable Containers (AREA)
US773901A 1967-11-08 1968-11-06 Moulded container having integral reinforcing Expired - Lifetime US3527373A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR127329 1967-11-08

Publications (1)

Publication Number Publication Date
US3527373A true US3527373A (en) 1970-09-08

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ID=8641405

Family Applications (1)

Application Number Title Priority Date Filing Date
US773901A Expired - Lifetime US3527373A (en) 1967-11-08 1968-11-06 Moulded container having integral reinforcing

Country Status (4)

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US (1) US3527373A (enrdf_load_stackoverflow)
DE (1) DE1807601A1 (enrdf_load_stackoverflow)
FR (1) FR1550376A (enrdf_load_stackoverflow)
GB (1) GB1231834A (enrdf_load_stackoverflow)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4589824A (en) * 1977-10-21 1986-05-20 United Technologies Corporation Rotor blade having a tip cap end closure
US4653671A (en) * 1984-01-09 1987-03-31 Christene Duffy Container
US4668484A (en) * 1984-02-13 1987-05-26 Elliott David J Transport containers for semiconductor wafers
US4832221A (en) * 1986-10-27 1989-05-23 Jacques Manem Cap with a sliding-flap closure
US4967995A (en) * 1989-02-27 1990-11-06 John Burgess Combination cover and dispenser for an ice cube tray
US5058746A (en) * 1989-10-04 1991-10-22 Morgan Iv Robert L Pallet container structure II
US5107990A (en) * 1990-03-14 1992-04-28 Devon Industries, Inc. Rigid closure lid to a disposable container for holding and disposing of used medical sharps and other medical-surgical materials
US5116758A (en) * 1989-12-29 1992-05-26 Kuldeep Verma Fermentation vessel closure
USD330734S (en) 1990-08-24 1992-11-03 Luten Everett E Storage container for chips
US5168959A (en) * 1992-01-08 1992-12-08 Davis Norman E Oil receiving container
US5388691A (en) * 1993-10-21 1995-02-14 White; Nona J. Protective case for remote control transmitter
US5400914A (en) * 1994-07-12 1995-03-28 Lin; Chih-Ying Sliding container cover
US20040216576A1 (en) * 2003-05-01 2004-11-04 Maxey James Dewey Protective spool dispenser and cutter
US20070091558A1 (en) * 2005-10-20 2007-04-26 Inventec Corporation Casing for notebook computer
US20070164032A1 (en) * 2006-01-03 2007-07-19 Cronin Edward P Container having a slideable cover
US20070273261A1 (en) * 2006-05-24 2007-11-29 Hoshizaki America, Inc. Systems and Methods for Providing a Removable Sliding Access Door for an Ice Storage Bin
US20080107852A1 (en) * 2006-11-08 2008-05-08 Rubb Justin D Foamed plastic structures
US20080250739A1 (en) * 2006-11-08 2008-10-16 Nova Chemicals Inc. Foamed plastic structures
US20090236262A1 (en) * 2008-03-21 2009-09-24 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Protective packaging for an led module
USD752313S1 (en) * 2014-04-01 2016-03-22 County Cemetary Services Ltd. Crematory urn
US9981783B2 (en) 2011-08-12 2018-05-29 J.L. Clark, Inc. Metal container with slideable top
USD998930S1 (en) * 2021-09-27 2023-09-12 Caoxian Shuofan Trading Co., Ltd. Pet cremation urn box
US20230399152A1 (en) * 2022-06-09 2023-12-14 Charmwood Chargers Llc Multi-compartment container with ball detent lid closure and stoppage feature

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3182856A (en) * 1962-11-20 1965-05-11 I C Bloom Stacking box construction
US3362564A (en) * 1964-10-16 1968-01-09 Oscar G. Mueller Sliding lid boxes
US3403714A (en) * 1967-02-23 1968-10-01 John M. Hulm Safety receptacle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3182856A (en) * 1962-11-20 1965-05-11 I C Bloom Stacking box construction
US3362564A (en) * 1964-10-16 1968-01-09 Oscar G. Mueller Sliding lid boxes
US3403714A (en) * 1967-02-23 1968-10-01 John M. Hulm Safety receptacle

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4589824A (en) * 1977-10-21 1986-05-20 United Technologies Corporation Rotor blade having a tip cap end closure
US4653671A (en) * 1984-01-09 1987-03-31 Christene Duffy Container
US4668484A (en) * 1984-02-13 1987-05-26 Elliott David J Transport containers for semiconductor wafers
US4832221A (en) * 1986-10-27 1989-05-23 Jacques Manem Cap with a sliding-flap closure
US4967995A (en) * 1989-02-27 1990-11-06 John Burgess Combination cover and dispenser for an ice cube tray
US5058746A (en) * 1989-10-04 1991-10-22 Morgan Iv Robert L Pallet container structure II
US5116758A (en) * 1989-12-29 1992-05-26 Kuldeep Verma Fermentation vessel closure
US5107990A (en) * 1990-03-14 1992-04-28 Devon Industries, Inc. Rigid closure lid to a disposable container for holding and disposing of used medical sharps and other medical-surgical materials
USD330734S (en) 1990-08-24 1992-11-03 Luten Everett E Storage container for chips
US5168959A (en) * 1992-01-08 1992-12-08 Davis Norman E Oil receiving container
US5388691A (en) * 1993-10-21 1995-02-14 White; Nona J. Protective case for remote control transmitter
US5400914A (en) * 1994-07-12 1995-03-28 Lin; Chih-Ying Sliding container cover
US20040216576A1 (en) * 2003-05-01 2004-11-04 Maxey James Dewey Protective spool dispenser and cutter
US7124674B2 (en) * 2003-05-01 2006-10-24 Nb Properties, Llc Protective spool dispenser and cutter
US20070091558A1 (en) * 2005-10-20 2007-04-26 Inventec Corporation Casing for notebook computer
US7319584B2 (en) * 2005-10-20 2008-01-15 Inventec Corporation Casing for notebook computer
US7721908B2 (en) * 2006-01-03 2010-05-25 J.L. Clark, Inc. Container having a slideable cover
US20070164032A1 (en) * 2006-01-03 2007-07-19 Cronin Edward P Container having a slideable cover
US20070273261A1 (en) * 2006-05-24 2007-11-29 Hoshizaki America, Inc. Systems and Methods for Providing a Removable Sliding Access Door for an Ice Storage Bin
US8087533B2 (en) * 2006-05-24 2012-01-03 Hoshizaki America, Inc. Systems and methods for providing a removable sliding access door for an ice storage bin
US20080107852A1 (en) * 2006-11-08 2008-05-08 Rubb Justin D Foamed plastic structures
US20080250739A1 (en) * 2006-11-08 2008-10-16 Nova Chemicals Inc. Foamed plastic structures
US20090236262A1 (en) * 2008-03-21 2009-09-24 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Protective packaging for an led module
US7789242B2 (en) * 2008-03-21 2010-09-07 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Protective packaging for an LED module
US9981783B2 (en) 2011-08-12 2018-05-29 J.L. Clark, Inc. Metal container with slideable top
USD752313S1 (en) * 2014-04-01 2016-03-22 County Cemetary Services Ltd. Crematory urn
USD998930S1 (en) * 2021-09-27 2023-09-12 Caoxian Shuofan Trading Co., Ltd. Pet cremation urn box
US20230399152A1 (en) * 2022-06-09 2023-12-14 Charmwood Chargers Llc Multi-compartment container with ball detent lid closure and stoppage feature
US12043453B2 (en) * 2022-06-09 2024-07-23 Charmwood Chargers Llc Multi-compartment container with ball detent lid closure and stoppage feature

Also Published As

Publication number Publication date
GB1231834A (enrdf_load_stackoverflow) 1971-05-12
DE1807601A1 (de) 1969-07-17
FR1550376A (enrdf_load_stackoverflow) 1968-12-20

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